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A kind of preparation method of bimodal ABS resin

A technology of ABS resin and small particle size, which is applied in the field of high-efficiency and easy-to-control bimodal ABS resin and its preparation, which can solve the problems of increasing the workload and time of the coagulation unit, and achieve the effect of improving the tensile strength and gloss

Active Publication Date: 2016-05-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] This kind of bimodal ABS technology requires the preparation of two different ABS latexes, which takes a long time, and the two kinds of ABS latexes need to be mixed during coagulation at the same time, which increases the workload of the coagulation unit

Method used

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  • A kind of preparation method of bimodal ABS resin
  • A kind of preparation method of bimodal ABS resin
  • A kind of preparation method of bimodal ABS resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. ABS graft polymerization:

[0026] First, the small particle size styrene-butadiene latex and large particle size polybutadiene latex are fully stirred and mixed into the reactor, and then part of the emulsifier, styrene, acrylonitrile, dodecyl mercaptan, and desalted water are added to the reactor. The temperature is controlled at 65°C. When the temperature rises to 48°C, add part of the activator and cumene hydroperoxide. After reacting for 1 hour, add the remaining emulsifier, styrene and propylene within 2 hours by continuous feeding Nitrile, dodecyl mercaptan, desalinated water, after adding the remaining activator, cumene hydroperoxide, after aging for 0.8 hours, the reaction is completed, and ABS latex is obtained;

[0027] 2. Filter the ABS latex obtained in the above 1 with a 100-mesh white steel filter, add an antioxidant, add 2 parts of concentrated sulfuric acid to the water, stir and heat, the temperature is controlled at 93 ° C, and the time is 15 minut...

Embodiment 2

[0037] 1. ABS graft polymerization:

[0038] First, the small particle size styrene-butadiene latex and large particle size polybutadiene latex are fully stirred and mixed into the reactor, and then part of the emulsifier, styrene, acrylonitrile, dodecyl mercaptan, and desalted water are added to the reactor. The temperature is controlled at 40°C. When the temperature rises to 50°C, add part of the activator and cumene hydroperoxide. After 2 hours of reaction, add the remaining emulsifier, styrene, and propylene within 3 hours by continuous feeding Nitrile, dodecyl mercaptan, desalinated water, after adding the remaining activator, cumene hydroperoxide, after aging for 1 hour, the reaction is completed, and ABS latex is obtained;

[0039] 2. Filter the ABS latex obtained in the above 1 with a 100-mesh white steel filter, add an antioxidant, add 2.5 parts of concentrated sulfuric acid to the water, stir and heat, the temperature is controlled at 95 ° C, and the time is 15 minut...

Embodiment 3

[0049] 1. ABS graft polymerization:

[0050] First, the small particle size styrene-butadiene latex and large particle size polybutadiene latex are fully stirred and mixed into the reactor, and then part of the emulsifier, styrene, acrylonitrile, dodecyl mercaptan, and desalted water are added to the reactor. The temperature is controlled at 80°C. When the temperature rises to 42°C, add part of the activator and cumene hydroperoxide. After reacting for 0.5 hours, add the remaining emulsifier, styrene, and propylene within 1 hour by continuous feeding Nitrile, dodecyl mercaptan, desalinated water, after adding the remaining activator, cumene hydroperoxide, after aging for 0.3 hours, the reaction is completed, and ABS latex is obtained;

[0051] 2. Filter the ABS latex obtained in the above 1 with a 100-mesh white steel filter, add an antioxidant, add 2.0 parts of concentrated sulfuric acid to the water, stir and heat, the temperature is controlled at 94 ° C, and the time is 15 ...

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Abstract

The invention relates to a method for preparing doublet acrylonitrile butadiene styrene (ABS) resin. Styrene-butadiene latex with small diameter and butadiene latex with large diameter are fully stirred and mixed together and are added with part emulsifier, styrene, acrylonitrile, dodecyl mercaptan and desalted water at the temperature of 40-80 DEG C, when the temperature is heated to 42-50 DEG C, part activator and cumyl hydroperoxide are added to react for 0.5-2 hours, a continuous feeding mode is adopted to add the residual emulsifier, styrene, acrylonitrile, dodecyl mercaptan and desalted water in 1-3 hours, the activator and the cumyl hydroperoxide are added to cure for 0.3-1 hour, the obtained ABS latex is added into concentrated sulphuric acid at the temperature of 80-98 DEG C for 5-20 minutes, coagulating, filtering and drying are carried out so as to obtain dry powder, the dry powder is mixed with styrene-acrylonitrile copolymer (SAN), and an extruding machine is used to extrude and pelletize so as to obtain an ABS finished product. The impact strength, tensile strength and gloss of the resin are all improved.

Description

technical field [0001] The invention belongs to the technical field of engineering plastic ABS production, and in particular relates to a high-efficiency and easy-to-control bimodal ABS resin and a preparation method thereof. Background technique: [0002] ABS resin is a thermoplastic polymer formed by the copolymerization of butadiene, styrene, and acrylonitrile. It is one of the important resins in engineering polymer materials. Bimodal ABS resin is a new ABS resin technology developed on the basis of general-purpose ABS resin. It refers to the addition of two (or more) rubber particles with different particle sizes during the grafting process. Tough resin, to obtain products with high impact strength, high tensile strength and excellent comprehensive properties. [0003] At present, the most important method for preparing bimodal ABS resin is to use emulsion graft polymerization technology to graft and copolymerize polystyrene and acrylonitrile on large particle size pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L55/02C08L25/12C08F279/04C08F2/24
Inventor 陆书来张柳孙继德单崇杰庞建勋张建军温冬梅朱学多穆秀云常育杰
Owner PETROCHINA CO LTD
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